<!-- <div>
    <button type="button" class="btn btn-outline-success" (click) = "addStudent()">添加</button> 
</div> -->

<div>
    <div class="input-group input-group-sm mb-3">
        <div class="input-group-prepend">
         <span class="input-group-text" id="inputGroup-sizing-sm">班级名称:</span>
        </div>
        <input type="text" [(ngModel)]="s.name" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-sm">
    
        <div>
            <button type="button" class="btn btn-outline-success" (click) = "addStudent()">添加</button> 
        </div>
    
    </div>
        <button type="button" class="btn btn-outline-primary" (click)="save()">保存</button>
        <button type="button" class="btn btn-outline-danger" (click)="goBack()">取消</button>
</div>



<table class="table">
<tr>
<th>班级名称</th>
<th>操作</th>
</tr>

<tr *ngFor="let s of sl">
<td>{{s.name}}</td>
<td>
    <button type="button" class="btn btn-outline-warning" (click)="toupdate(s)">修改</button>
    <button type="button" class="btn btn-outline-danger" (click)="deleteStudent(s)">删除</button>
</td>
</tr>

</table>